using NeonSprawl.Server.Game.Npc;

namespace NeonSprawl.Server.Game.Combat;

/// <summary>Deterministic NPC telegraph-complete damage resolve (NEO-95).</summary>
public static class NpcAttackOperations
{
    /// <summary>
    /// Applies catalog <paramref name="attackDamage"/> to <paramref name="holderPlayerId"/> when
    /// the threat row still names that holder for <paramref name="npcInstanceId"/>.
    /// </summary>
    public static bool TryResolveTelegraphComplete(
        string npcInstanceId,
        string holderPlayerId,
        int attackDamage,
        IPlayerCombatHealthStore playerHealthStore,
        IThreatStateStore threatStore)
    {
        if (attackDamage <= 0)
        {
            return true;
        }

        if (string.IsNullOrWhiteSpace(holderPlayerId) ||
            !threatStore.TryGet(npcInstanceId, out var threat) ||
            string.IsNullOrEmpty(threat.AggroHolderPlayerId) ||
            !string.Equals(threat.AggroHolderPlayerId, holderPlayerId, StringComparison.Ordinal))
        {
            return false;
        }

        if (!playerHealthStore.TryApplyDamage(holderPlayerId, attackDamage, out var snapshot))
        {
            return false;
        }

        if (snapshot.Defeated)
        {
            // TODO(E9.M1): player_death
        }

        return true;
    }
}